54813781 has 8 divisors (see below), whose sum is σ = 60518304. Its totient is φ = 49229520.

The previous prime is 54813769. The next prime is 54813809. The reversal of 54813781 is 18731845.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 54813781 - 2⁵ = 54813749 is a prime.

It is a super-3 number, since 3×54813781³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 54813781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54813721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29106 + ... + 30931.

It is an arithmetic number, because the mean of its divisors is an integer number (7564788).

Almost surely, 2^54813781 is an apocalyptic number.

It is an amenable number.

54813781 is a deficient number, since it is larger than the sum of its proper divisors (5704523).

54813781 is a wasteful number, since it uses less digits than its factorization.

54813781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60131.

The product of its digits is 26880, while the sum is 37.

The square root of 54813781 is about 7403.6329595679. The cubic root of 54813781 is about 379.8655595517.

The spelling of 54813781 in words is "fifty-four million, eight hundred thirteen thousand, seven hundred eighty-one".